Car-truck.



J. A. PILCHER.

CAR TRUCKi APPLICATION FILED MAR. l0, 1915.

1,182,704, 121mm Muy 9, 1916.

UNITED sTATEs PATENT oEETcE. y

Y JOHN A. PILCHE, OF ROANOKE, VIRGINIA.

c CAB-TRUCK.

Application tiled March 10, 1915.

Toi-glltohom it may concern: it known that I, Joux A. Pinoneu, a Ciltienl of the United States, residing at Roanoke, in the county of Roanoke and Stateof Virginia, have invented certain new l and .useful Improvements in Car-Trucks. of

whiclrthe following is a specilication.

{f7-@his linvention relates to car trucks, and thelprincipal object thereof is to provide an improved method of forming truck side frames'iof rolled sections.

12': Other-:Objects are to provide an improved .for f. .spacing members and of load-supfi members, and improved methods of he arch members to the truck oil and other objects in view the Tnveiiticonsists in the formation, combivf"nationan d arrangement of elements as will Off-befhetieii described and claimed.

i, 'lntli'efdrawings Figurtl 1 is a side elevation-(ifa. portion of a truck embodying the present improvements. Fig. 2 is a partial plan view of the same and Fig. 3 is a transverse section of the same, taken on the line A B, Fig. 1. Fig. 4 is a perspective view showing the method of securing the ends of the side frame arch members together and to the oil boxes.

Referring to these drawings, wherein like parts are similarly designated, 1 represents an ordinary truck wheel mounted upon one end Gif an axle 2. It will be understood that a plurality of such axles with two wheels each occur, one only being shown for the reason that this form of truck construction is old and well known. At 3 is a customary oil box, which, with its contained parts forms a journal bearing for the axle 2, and this also is of standard M. C.. B. construction.

The load of the car body is customarily carried on the center plate 4, which is usually a part of the bolster 5 and this bolster is supported on springs 6. The springs are carried on a seat 7, which is then supported on rollers 8. Various of the parts just enumerated are shown mainly in dotted lines yfor the reason that they have no essential 50 bearing on the invention in question.

The truck-side frame is composed primarily of atop arch bar or compression member 9, a bottom arch bar or. tension member 10 and a spacing member 11. 'The 55 said top and bottom arch members have Specification of Letters atent.

Patented May a. 1916.

serial No. 13,373. i

spaced, vertical relationship with each other at the central portion, and at the ends they converge and are co-actingly secured togcther so as to complete the triangle or' members for truss action in the frame. The spacing member 11 is detached so as to permit the arch members to be made of standard,l rolled sections and is made of U-shape when viewed in side elevational view, the legs 12 and 13 thereof forming tie. members between the top' and bottom arch bars, or 'between the top arch bar and the bottom of the member 1l, being secured to the top arch member by means of the rivets 1%-, and to the bottom arch member by means of the rivets l5. The U-shape of this spacing member 11 provides a central opening 16,

which serves to admit the springs and roller seat as well as the ends of the bolster 5, and the sides of the tie members 12 and 13 form wearing faces 17 for cooperation with the adjacent sides of the bolster. The bottom portion 18 of the spacing member ll is adapted` to form seats for the rollers S, thus serving as a load receiving means for the load from these rollers which load is transmitted in turn through the bottom of this spacer casting to the arch member construetion of the truck. It has been the general practice in trucks ot' this character to form these tie members of vertically disposed bolts which are usually incased within' column.

guides, the column guide serving vas a guiding means for the bolster and the bolts serving as tie members for the bars. trucks thc bottom arch bar is usually subjected to bending stresses from the bolster load for the reason that the load is applied to the bottom arch bars on flat surfaces or at points removed from the tie members and out of the straight line of the tension in the bottom arch member. Also the column bolts are called on to carry the full load from the curved portion are straight, upwardly in- In suchv curved portion of the bottom arc no bending stresses will be imparted to the.

clined, tangential ends 2O which extend to and are co-actingly secured to the adjacent ends 21 of the top arch bar.

The'bottom portion 1SA of the 'spacing member 11,.'which serves as a load-receiving means, is made'to conform to and bears upon the curved portion 19 ofthe bottom arch member and vissuppo'rted entirelg upon this bottom arch member, for theload' will be transmitted thereto inl directions radial vto A the curved portion 19.

i leavingno unsupported portion of the member 10 'out of line with the'tensien loads,'this In order that the member 18 may be ropf erlyseated on the bottom 'arch bar,- a in order further that the load will be imp ated to the full length of the curved poron,

spacing member 11 extends slightly beyond vthe curve 19, being made with straight, tangential extensions 22 at thecnds, which-coincide'with the tangentialr portions 20 of the bottom arch bar. Thus the bottom portion of.'

the spacing) member forms meansl for transferring the load to the bottom'arch member as direct stresses, and furthermore the tie ,members 12 and 13 serve now 'only to take forms in some instances a part of the trussy structure. The tie-members 25 alSOLservex to restrain the oil'boxes-when the brakes are applied to the wheels. At 241 have shown means for attachingthis box tie'barv 25 to the spacing member 11, thus providing means through this spacing'member for securing the bottom of the oil box@ to the truss member 10 without weakening this bottom arch member by cutting unnecessary holes in the same, it frequently happening that the rivets 15 are not in" a correct location to serve as securing meansv for the bars 25. v

It has furthermore been customary in arch bar trucks to bri/ng the top and bottom arch bars together over the oil boxes and \\coactingly secure these members together by means of the box bolts 26. 1 This form of construction necessitates the intersection of the truss lines at a point near the inner edge of the oil box, with-a consequent bending moment in the horizontal portivons of the arch members over the oil boxes. I have now provided an improved method of joinbar, hence ing these arch members together over the 'oil boxes, and also of securing the oil boxes holes 29, the same being disposed transversely of the truck. The holes 29 register with a similar hole in a similar enlargement 30 on the top arch member, and the pin 31 passes throughf and thus co-actingly .secures together these arch members. The loads are thus equalize'd in the truss structure without ssing'through the box bolts asa shearing cad, and furthermore, the intersection ofV the truss lines is carried ahead to a point well o ver the 4oil boxes so thatpractically no bending occurs in the portion1 of the arch -members over the oil boxes. The enlargements 28 may have bearing onthe top of the oil box if desired to somewhat relieve the pin 31. Thecnd of the top arch member being disposed between the legs 27 of the bottom arch member, the pin $1 is placed in. double shear and the reactions from the truss are centrally equalized. Furthermore, the central disposition of the member to which the oil boxis' secured provides more simple means for disposing of the bolts 26 /and puts the vertical load centrally on this Voil box.- l 1 The spacing member 11 is shown as an integral casting, although it-niight be made otherwise. Also the customaryv hanger brackets 32 are shown as cast integral wlth Y art might make alterations in the embodi- *ment of my invention .within the scope of `.the 'claims without departing from the spirit thereof.

l Havin thus described my invention, vwhatIcaimis: 1

1. In a car truck, a side frame comprising a top arch member,'a bottom arch member in spaced vertical relationship therewith, and a central ispacing member therebetween, the said bottom arch member embodying a central curved portion with straight, upwardly' inclined, tangential ends, the said ends extending to and being co'actingly secured to the adjacent ends of the said top arch member and being bifurcated, and each of the lega thereof beinor provided with an enlargement, pierced5 transversely of said member, the ends ,of the said compression member being disposedbetween the legs`o'f the bifurcated ends of the said bottom arch member and being provided with similar pierced enlargements adapted to registery with those of the bifureated ends of the bottom arch pini.' speeec through said elite one. adapted to coacttxe :wel top and bottom arch ,ln e mi: truck, e plurality efexles and we. e Lrneeed eide heme Supported et its you the oil bores; of adjacent eles, top web memlfl holes et the the ettai'zhment o bottom meh l .ationship with www@ sin the mfntral porermineting at its :e mid top arch l th." eei bottom urrh teil and the. reseltng 'elf @on with esffh other Irwin, the emile ot' the n?! emw ved be- 4me supported et of relief axles, n HQ orari Vizem- ,hl Me frame l; et the 'A 5- rch number, the ende f-" with imt'rrber heini: bifxlrA cated and the resulting legs having spaced relation with each other transyersely of the truck, the ends of the said top arch member being embraced between the legs of the ends of the said bottom arch member and being co-actng1y secured thereto, and means for the attachment of oil boxes to the ende of the said trussed side frame.

4. In a car truck, a plurality of axles :and oil boxes, a trussed side frame supported :it its. ends upon the oil boxes of adjacent axles, said side frame comprising a top arch mehr ber, a bottom arch member in spaced verme. l relationship with the saidv top arr-:Tn member at the central portion of said side treme om! terminating at its ends adjacent the enfle of the said top arch member, the ends ot' the said bottom arch member being biurented and the resulting legs having spaced relu tion with eaoh other trnnswreely ol' 'the truck, the ends of the said top arch member being embraced between the legs of the erols of the said bottom arch member sind. being; cometingly secured thereto, emi mesme for the attachment of oil boxe-R to the ends. said top arch member.

ln testimony whereof I affix es v .efglifitnre in presence of two witneeses.

`Witnesses R. B. KORTE, H. W, REYNOLDS. 

